Executive Summary

Computing is undergoing a seismic shift from client/server to the cloud, a shift similar in importance and impact to the transition from mainframe to client/server. The emergence of cloud computing as one of the dominant technology trends in coming decades, is virtualization platform that provides a services to different technology in IT infrastructure. One of those technologies is Voice over Internet Protocol (VoIP). VoIP is IP enabled services that involved in the delivery on voice communication and multimedia sessions over IP. The cloud computing represents a significant shift in the VoIP technology. This paper presents the survey of cloud computing. It includes a discussion of cloud computing service, characteristics of cloud.